Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Gnomish

drab

noun. labour, toil, irksome work

A noun appearing as G. drab “labour, toil (irksome work)” in the Gnomish Lexicon of the 1910s (GL/30).

Neo-Sindarin: I retain ᴺS. drab for (unpleasant) work for purposes of Neo-Sindarin, since it does not conflict with any later words or roots. [N.] tass “labour, task” can be used for work without the unpleasant connotation.

drab-

verb. to labour, work; (impersonal) to irk, annoy

A verb appearing as G. drab- meaning “labour, toil” in the Gnomish Lexicon of the 1910s (GL/30), with the sense “to irk, annoy” when used impersonally.

Neo-Sindarin: I retain ᴺS. drab- for (unpleasant) work for purposes of Neo-Sindarin, since it does not conflict with any later words or roots. [N.] muda- “labour, toil, ✱work” can be used for work without the unpleasant connotation.

drabri

adjective. labouring

A word appearing as G. drabri “labouring” in the Gnomish Lexicon of the 1910s based on G. drab- “to labour” and similar words (GL/30).

Neo-Sindarin: I would adapt this adjective as ᴺS. drabol for purposes of Neo-Sindarin, as the active-participle of the verb ᴺS. drab- “to labour”.